private ValidOption GetLongOption(string longOpt)
{
switch (ValidOptions.Count(v => v.LongOption.StartsWith(longOpt)))
{
case 0:
throw new InvalidOptionException(string.Format("{0} is not a valid option", longOpt));
case 1:
return(ValidOptions.FirstOrDefault(v => v.LongOption.StartsWith(longOpt)));
default:
string message = string.Format("{0} could be interpreted as {1}", longOpt,
string.Join(" or ", (from v in ValidOptions
where v.LongOption.StartsWith(longOpt)
select v.LongOption).ToList()));
throw new AmbiguousOptionException(message);
}
}
public void Parse(IEnumerable <string> argv)
{
Options = new List <Option>();
Arguments = new List <string>();
bool needOptArg = false;
bool stopScanning = false;
foreach (string argument in argv)
{
if (stopScanning)
{
Arguments.Add(argument);
continue;
}
if (!argument.StartsWith("-"))
{
if (!needOptArg)
{
Arguments.Add(argument);
continue;
}
Options[Options.Count - 1].Argument = argument;
needOptArg = false;
continue;
}
if (argument == "--")
{
stopScanning = true;
continue;
}
if (argument.StartsWith("--"))
{
string[] parts = argument.Split('=', ':');
string longOpt = parts[0].Substring(2);
ValidOption validOption = GetLongOption(longOpt);
Options.Add(new Option {
Flag = validOption.Flag
});
if (validOption.OptionType != OptionType.None)
{
if (parts.Length > 1)
{
Options[Options.Count - 1].Argument = parts[1];
}
else
{
needOptArg = true;
}
}
continue;
}
foreach (char flag in argument.Where(c => c != '-'))
{
if (ValidOptions.Count(v => v.Flag == flag) == 0)
{
throw new InvalidOptionException(string.Format("{0} is not a valid option.", flag));
}
Options.Add(new Option {
Flag = flag
});
}
needOptArg = ValidOptions.Last(m => m.Flag == Options[Options.Count - 1].Flag).OptionType !=
OptionType.None;
}
}